Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 64
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
BMC Psychiatry ; 20(1): 108, 2020 03 06.
Artigo em Inglês | MEDLINE | ID: mdl-32143714

RESUMO

BACKGROUND: Physical inactivity is a key contributor to the global burden of disease and disproportionately impacts the wellbeing of people experiencing mental illness. Increases in physical activity are associated with improvements in symptoms of mental illness and reduction in cardiometabolic risk. Reliable and valid clinical tools that assess physical activity would improve evaluation of intervention studies that aim to increase physical activity and reduce sedentary behaviour in people living with mental illness. METHODS: The five-item Simple Physical Activity Questionnaire (SIMPAQ) was developed by a multidisciplinary, international working group as a clinical tool to assess physical activity and sedentary behaviour in people living with mental illness. Patients with a DSM or ICD mental illness diagnoses were recruited and completed the SIMPAQ on two occasions, one week apart. Participants wore an Actigraph accelerometer and completed brief cognitive and clinical assessments. RESULTS: Evidence of SIMPAQ validity was assessed against accelerometer-derived measures of physical activity. Data were obtained from 1010 participants. The SIMPAQ had good test-retest reliability. Correlations for moderate-vigorous physical activity was comparable to studies conducted in general population samples. Evidence of validity for the sedentary behaviour item was poor. An alternative method to calculate sedentary behaviour had stronger evidence of validity. This alternative method is recommended for use in future studies employing the SIMPAQ. CONCLUSIONS: The SIMPAQ is a brief measure of physical activity and sedentary behaviour that can be reliably and validly administered by health professionals.


Assuntos
Exercício Físico , Transtornos Mentais , Comportamento Sedentário , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Inquéritos e Questionários , Adulto Jovem
2.
Pharmacopsychiatry ; 45(4): 162-3, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22290205

RESUMO

A 29-year-old depressed, otherwise healthy female patient was treated with agomelatine and duloxetine. She developed subsequent akathisia, which subsided after cessation of agomelatine. As a cause we suggest a pharmacodynamic drug-drug interaction leading to noradrenergic overstimulation. We recommend only gradual dose titration when combining the 2 substances to minimize the risk for side effects.


Assuntos
Acetamidas/efeitos adversos , Acatisia Induzida por Medicamentos/etiologia , Antidepressivos/efeitos adversos , Hipnóticos e Sedativos/efeitos adversos , Tiofenos/efeitos adversos , Adulto , Transtorno Depressivo Maior/tratamento farmacológico , Cloridrato de Duloxetina , Feminino , Humanos
3.
Urologe A ; 60(7): 943-949, 2021 Jul.
Artigo em Alemão | MEDLINE | ID: mdl-32415394

RESUMO

Though it is thousands of years old, prostate cancer (PCa) has only been known for 200 years. Until about 50 years ago, the diagnosis could only be made by digital rectal examination. Although the first prostate biopsies were already implemented in the beginning of the last century, it only obtained importance with the introduction of prostate-specific antigen (PSA) testing in the early screening for PCa and the pathologist, thus, became an essential partner for the urologist. In more recent years, specific MRI has significantly increased the accuracy of prostate biopsies. Thus, the question arises whether this technique is going to be so meaningful one day that prostate biopsy and the associated pretherapeutic histology are going to be redundant.


Assuntos
Antígeno Prostático Específico , Neoplasias da Próstata , Biópsia , Exame Retal Digital , Humanos , Masculino , Palpação , Neoplasias da Próstata/diagnóstico
4.
Aktuelle Urol ; 39(1): 68-70, 2008 Jan.
Artigo em Alemão | MEDLINE | ID: mdl-18228192

RESUMO

We report about a rare case of malakoplakia in a female urethral diverticulum. A 25-year-old patient with a long history of recurrent urinary tract infections and a plum-sized, painful swelling on the vaginal roof presented for operative treatment. In the anamnesis the patient reported about two spontaneous perforations, emptying several millilitres of pus each time. After total operative excision using a vaginal approach the histology showed malakoplakia in a urethral diverticulum. We found the typical intracytoplasmatic "Michaelis-Gutmann bodies" as well as "von Hansemann cells". Postoperatively we excluded an underlying tumour disease or a chronic infection. The further urological diagnostics (cystoscopy and MRI) were without any pathological findings. In patients with atypical cystic tumours of the urogenital tract, especially with an immune deficiency, malakoplakia should be taken in consideration. The preferred therapy is surgical management followed by long-term antibiosis as well as a close follow-up as recurrences are frequent.


Assuntos
Divertículo , Malacoplasia , Doenças Uretrais , Adulto , Antibacterianos/uso terapêutico , Cistoscopia , Divertículo/complicações , Divertículo/diagnóstico , Divertículo/diagnóstico por imagem , Divertículo/patologia , Divertículo/cirurgia , Feminino , Seguimentos , Humanos , Imageamento por Ressonância Magnética , Malacoplasia/diagnóstico , Malacoplasia/patologia , Cuidados Pós-Operatórios , Radiografia , Recidiva , Fatores de Tempo , Uretra/patologia , Doenças Uretrais/complicações , Doenças Uretrais/diagnóstico , Doenças Uretrais/diagnóstico por imagem , Doenças Uretrais/patologia , Infecções Urinárias/complicações
5.
Urologe A ; 46(2): 166-9, 2007 Feb.
Artigo em Alemão | MEDLINE | ID: mdl-17221244

RESUMO

The first successful nephropexy was performed in the year 1881. From this time, surgical therapy of nephroptosis has always been a subject of discussion. A partly uncritical acceptance led to nephropexy being the most performed urological operation at the beginning of the 20th century, with up to 200 different surgical variations. As early as the 15th century, a first description of ren mobilis was made by Alessius de Pedemontanus. The first surgical intervention for the treatment of nephroptosis was performed by Gilmore in 1870. In 1877, the American Dowell from New Orleans tried a fixation of the kidney through a seton, however, this operation failed. Eventually in 1881, Eugen Hahn from Berlin was able to perform the first successful nephropexy, he named this method "nephroraphy". In 1882, the first modification was made by Bassini with sutures through the renal capsule. Finally, the gynaecologist George Edebohl led nephropexy into a great popularity and secured the method through numerous technical innovations. By 1936, approximately 170 different surgical methods existed for fixation of the kidney. An accurate diagnosis is imperative before performing nephropexy. There were times in which this operation was carried out much too often and, therefore, had a bad reputation. However, it is not correct to drop nephropexy altogether as some would prefer. The statement by Professor Voelcker from Halle in the year 1911 that for all those who have a urinary obstruction and those with a beginning dilation, nephropexy is still justified and may - when correctly performed provide many blessings". Nothing needs to be added to this.


Assuntos
Nefropatias/história , Técnicas de Sutura/história , Procedimentos Cirúrgicos Urológicos/história , Prolapso Visceral/história , Europa (Continente) , História do Século XVII , História do Século XIX , História do Século XX , Humanos , Estados Unidos
6.
Urologe A ; 45(4): 489-92, 2006 Apr.
Artigo em Alemão | MEDLINE | ID: mdl-16369845

RESUMO

The death of Wolfgang Amadeus Mozart was mysterious from the very first day, and cause of wildest speculation and adventurous assertions. Over the last 100 years, medical science has investigated the physical sufferings and the mysterious death of Mozart with increasing intensity. By means of letters from his father Leopold, his sister "Nannerl", himself and reports from his physicians and contemporaries, we would like to create a medical pathography. The rumour that Mozart was poisoned appeared soon after his early death at the age of 35 on December 5th 1791, and was kept up persistently. Accused were the physician van Swieten, Mozart's freemason's loge and the royal band master Salieri. Mozart, however, died due to chronic kidney disease and ultimately due to uraemia. Once the renal damage has reached a certain point, a minimum of additional stress leads to decompensation. This catastrophe occurs typically within the fourth decade of life. When listening to Mozart's music, we should remember that this apparently happy person was actually a premature adult robbed of his childhood, whose short life was an endless chain of indisposition, over fatigue, misery, concern and illness.


Assuntos
Pessoas Famosas , Falência Renal Crônica/história , Música/história , Uremia/história , Adulto , Áustria , História do Século XVIII , Humanos , Masculino
7.
Urologe A ; 45(9): 1184-6, 2006 Sep.
Artigo em Alemão | MEDLINE | ID: mdl-16773384

RESUMO

Already 94 years ago in 1910, Dr. Hans Christian Jacobaeus performed the first clinical laparoscopic surgery in Stockholm. His pioneering procedure was based on the animal experiments of Georg Kelling (1866-1945), a German physician from Dresden, who performed the first laparoscopic intervention in 1901 using a Nitze cystoscope in a dog. In 1910 Jacobaeus published his first experiences with laparoscopic surgery in the Münchner Medizinische Wochenschrift under the title "The possibility to perform cystoscopy in examinations of serous cavities." He used this technique for diagnostic purposes in unclear abdominal complaints and functional impairment. Jacobaeus was the first who pointed out the possibility of causing injury to organs, especially the gut, by inserting the trocar. In 1910 Jacobaeus recognized the immense diagnostic and therapeutic possibilities of laparoscopic surgery, but also the difficulties and limits. He also was the first who recognized the need to complete training sessions on animals and corpses. He demanded the development of special laparoscopic instruments to optimize and simplify the operation.


Assuntos
Laparoscopia/história , Toracoscopia/história , Animais , História do Século XIX , História do Século XX , Humanos , Suécia
8.
Urologe A ; 45(7): 868-71, 2006 Jul.
Artigo em Alemão | MEDLINE | ID: mdl-16773385

RESUMO

On 23 September 1901, Georg Kelling (1866-1945) from Dresden performed a celioscopy with a Nitze cystoscope on a dog in Hamburg. This was the beginning of the era of laparoscopy.His doctoral thesis already reflected his early interest in the anatomy and physiology of the gastrointestinal tract. This experience, together with his knowledge on air insufflation of the abdomen, enabled him to be the first to develop the procedure he named "celioscopy." During this pioneer time of laparoscopy, he developed various basic principles that are still valid today and demonstrated astonishingly visionary skills. Although his pioneering achievements have hardly been acknowledged to this day, modern laparoscopy has confirmed Kelling's visions and scientific work in almost all aspects. His name and achievements have most definitely earned a place in the history of endoscopy.


Assuntos
Laparoscópios/história , Laparoscopia/história , Urologia/história , Alemanha , História do Século XIX , História do Século XX
9.
Aktuelle Urol ; 37(4): 281-3, 2006 Jul.
Artigo em Alemão | MEDLINE | ID: mdl-16878282

RESUMO

INTRODUCTION: Malignant mesothelioma of the tunica vaginalis is a very rare malignant tumour. The prevalence of mesothelioma is about 1 : 1 000 000: Only 1 % have their origin in the tunica vaginalis testis with a 5-year survival of less than 5 %. About 80 cases have been reported in the literature. In 41 % of these cases exposure to asbestos for many years was determines. CASE REPORT: We report on a 76-year-old patient who presented with an atypical hydrocele testis. Intraoperatively, thickened testicular walls and an crystalline lawn adjacent to the tunica vaginalis testis were found. CONCLUSIONS: Ultrasonography showing snow flurries together with cloudy hydrocele fluid and visible crystal particles and thickened testicular walls may help to identify a mesothelioma of the testicular walls. Intraoperative frozen section and a high inguinal orchiectomy is the operative method of choice.


Assuntos
Mesotelioma , Neoplasias Testiculares , Idoso , Amianto/efeitos adversos , Diagnóstico Diferencial , Humanos , Masculino , Mesotelioma/diagnóstico por imagem , Mesotelioma/etiologia , Mesotelioma/patologia , Mesotelioma/cirurgia , Exposição Ocupacional/efeitos adversos , Orquiectomia , Neoplasias Testiculares/diagnóstico por imagem , Neoplasias Testiculares/etiologia , Neoplasias Testiculares/patologia , Neoplasias Testiculares/cirurgia , Testículo/patologia , Fatores de Tempo , Ultrassonografia
10.
Aktuelle Urol ; 37(6): 445-8; quiz 421-2, 2006 Nov.
Artigo em Alemão | MEDLINE | ID: mdl-17099834

RESUMO

INTRODUCTION: Scrotal lymphangioma is a rare differential diagnosis in boys with acute scrotal pain. CASE REPORT: A 5-year-old boy presented with acute scrotal pain and swelling. Physical examination demonstrated an unusual cystic scrotal mass with a normal testis. Ultrasound and MRI showed a complex septated cystic mass. The tumor was excised completely via an inguinal and scrotal approach. 2-year follow-up examinations with physical examination and ultrasound have shown no evidence of recurrence. CONCLUSIONS: Scrotal lymphangiomas are commonly misdiagnosed preoperatively. When ymphangioma is suspected, ultrasound and MRI imaging of the adjacent inguinal, perineal and pelvic region should be performed. To prevent recurrence, complete surgical excision is mandatory.


Assuntos
Neoplasias dos Genitais Masculinos/diagnóstico , Linfangioma/diagnóstico , Dor/etiologia , Escroto/diagnóstico por imagem , Doença Aguda , Pré-Escolar , Diagnóstico Diferencial , Neoplasias dos Genitais Masculinos/patologia , Humanos , Linfangioma/patologia , Imageamento por Ressonância Magnética , Masculino , Dor/diagnóstico por imagem , Escroto/patologia , Ultrassonografia
11.
Urologe A ; 55(10): 1353-1359, 2016 Oct.
Artigo em Alemão | MEDLINE | ID: mdl-27518791

RESUMO

The history of kidney transplantation is a history of many unsuccessful efforts and setbacks, but also the history of perseverance, pioneering spirit, and steadfast courage. The first successful transplantation of a dog kidney was done by the Austrian Emerich Ullmann (1861-1937) in 1902. The kidney was connected to the carotid artery of the dog and the ureter ended freely. The organ produced urine for a couple of days before it died. In 1909, there were efforts to transplant human kidneys from deceased patients to monkeys and in the following year the first xenotransplantation in humans was completed. Different kinds of donors were tried: dogs, monkeys, goats and lambs, all without success. In 1939, the first transplantation from a deceased human donor was done by the Russion Yurii Voronoy, the patient survived for only a couple of days, and the organ never worked. In 1953, the first temporarily successful transplantation of a human kidney was performed by Jean Hamburger in Paris. A 16-year-old boy received the kidney of his mother as living donor transplantation. Then in 1954, a milestone was made with the first long-term successful kidney transplantation by Joseph Murray: the transplantation was done between monozygotic twins; the organ survived for 8 years. For his efforts in kidney transplantation, Murray was honored with the Nobel Prize in medicine in 1990. In 1962, the first kidney transplantation between genetically nonrelated patients was done using immunosuppression and in 1963 the first kidney transplantation in Germany was done by Reinhard Nagel and Wilhelm Brosig in Berlin. The aim of this article is to present the history of kidney transplantation from the beginning until today.


Assuntos
Falência Renal Crônica/história , Falência Renal Crônica/terapia , Transplante de Rim/história , Nefrologia/história , Europa (Continente) , História do Século XIX , História do Século XX , História do Século XXI , Humanos
12.
Aktuelle Urol ; 36(3): 249-51, 2005 Jun.
Artigo em Alemão | MEDLINE | ID: mdl-16001342

RESUMO

INTRODUCTION: We are presenting a rare complication after femorofemoral bypass surgery. CASE REPORT: In a 61-year-old male patient, a femorofemoral crossover bypass graft was inadvertently placed through the urinary bladder. Postoperatively, the patient developed macrohematuria, which cleared spontaneously. The diagnosis of an intravesical graft was made 3 months after surgery by cystoscopy performed because of dysuria. The patient underwent open bladder surgery 7 months later as he refused earlier intervention. The misplaced graft, which was not infected and showed good function and perfusion, was extravesically relocated. At a 16-month follow-up examination, the patient is free of urological symptoms and the bypass functions well. CONCLUSIONS: In case of dysuria or macrohematuria after vascular surgery in the vicinity of the urinary bladder, a misplaced bypass should be excluded.


Assuntos
Arteriopatias Oclusivas/cirurgia , Prótese Vascular , Artéria Femoral/cirurgia , Corpos Estranhos/diagnóstico , Migração de Corpo Estranho/diagnóstico , Perna (Membro)/irrigação sanguínea , Complicações Pós-Operatórias/diagnóstico , Bexiga Urinária , Anastomose Cirúrgica , Seguimentos , Corpos Estranhos/cirurgia , Migração de Corpo Estranho/cirurgia , Hematúria/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Reoperação , Bexiga Urinária/lesões , Transtornos Urinários/etiologia
13.
Biol Psychiatry ; 43(11): 829-39, 1998 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-9611673

RESUMO

BACKGROUND: Sleep deprivation (SD) exerts a beneficial effect on mood and sleep in about 60% of depressed patients usually followed by a relapse into depression after the recovery night. Short phases of sleepiness, especially naps in the early morning, may be responsible for this phenomenon. METHODS: To evaluate the effect of short, even ultrashort phases of sleep-microsleep (MS) during partial sleep deprivation (PSD) on mood, cognitive psychomotor performance (CPP), and sleep, an electroencephalograph (EEG) was continuously recorded over 60 hours in 12 patients with major depression. Subjective mood was assessed by a visual analogue scale and CPP by a letter cancellation test. RESULTS: The results illustrate that in depressed patients during PSD the amount of MS is increased, predominantly in the early morning, which was subjectively unrecognized and not observed by nursing staff. Patients with a low cumulative amount of MS during PSD improved significantly in mood, CPP, and sleep pattern compared to the patients with a high amount of MS who showed only slight changes. CONCLUSION: Therefore, accumulated MS may influence the SD-induced positive effects in depressed patients.


Assuntos
Transtorno Depressivo Maior/terapia , Privação do Sono , Sono , Vigília , Adulto , Idoso , Nível de Alerta , Atenção , Ritmo Circadiano , Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inventário de Personalidade , Polissonografia
14.
Neurobiol Aging ; 16(2): 205-9, 1995.
Artigo em Inglês | MEDLINE | ID: mdl-7777138

RESUMO

The neuropathologic hallmarks of Alzheimer's disease (AD) are very prominent in the hippocampus, a brain site which is pivotal for the regulation of the hypothalamic-pituitary-adrenal (HPA) system. Thus, the combined dexamethasone-suppression/CRH-stimulation-test outcome in patients with AD was compared to that of healthy elderly controls to assess--with a more refined neuroendocrine challenge procedure--HPA function in AD. Cortisol secretion after dexamethasone (DEX) pretreatment and before CRH was increased in Alzheimer's patients and 21% of this group were DST-nonsuppressors. None of the healthy control subjects escaped DEX-induced suppression of cortisol. However, after additional CRH administration, AD patients released significantly less cortisol and ACTH than the control subjects. No correlations were found between any of the endocrine parameters and degree of severity of dementia. It is concluded that the DST part of the DEX/CRH test better reflects glucocorticoid feedback disturbances, probably at a suprapituitary level. The CRH part of the DEX/CRH-test outcome might indicate the loss of endogenous CRH-Arginine-Vasopressin (AVP) synergism of the HPA system of these patients.


Assuntos
Doença de Alzheimer/fisiopatologia , Sistema Hipotálamo-Hipofisário/fisiopatologia , Sistema Hipófise-Suprarrenal/fisiopatologia , Hormônio Adrenocorticotrópico/sangue , Idoso , Idoso de 80 Anos ou mais , Hormônio Liberador da Corticotropina , Dexametasona , Feminino , Humanos , Hidrocortisona/sangue , Masculino , Pessoa de Meia-Idade
15.
Neuropsychopharmacology ; 14(4): 253-63, 1996 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-8924193

RESUMO

Pharmacokinetic measurements, neuroendocrine responses, and side effects profiles of intravenous infusions of 20 mg citalopram over 30 minutes during the early afternoon have been studied. Eight healthy male volunteers were enrolled in a placebo- (saline) controlled, single-blind, cross-over protocol. Plasma concentrations of the parent compound showed a double exponential decay. Demethyl and didemethyl metabolites were not detectable, but low concentrations of the propionic acid derivative of citalopram were found. Determination of the citalopram enantiomers yielded a balanced S(+)/R(-) ratio of 0.9 to 1.2. The endocrine response to the drug was characterized by significant increases in plasma prolactin and cortisol. Except for one subject, who developed pronounced side effects, human growth hormone showed a surge following saline that was inhibited following citalopram. Rectal temperature and heart rate were not affected and tolerability was favorable. Because of citalopram's extremely high selectivity for the presynaptic 5-hydroxytryptamine nerve terminals, the present data suggest that it might be a promising tool for the investigation of serotonergic function in the human brain in vivo.


Assuntos
Citalopram/administração & dosagem , Receptores de Serotonina/efeitos dos fármacos , Citalopram/efeitos adversos , Citalopram/farmacocinética , Hormônio do Crescimento Humano/metabolismo , Humanos , Masculino , Pessoa de Meia-Idade , Prolactina/metabolismo , Método Simples-Cego , Fatores de Tempo
16.
Neuropsychopharmacology ; 8(1): 87-92, 1993 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-8424849

RESUMO

A novel brain-selective acetylcholinesterase inhibitor, SDZ ENA 713, is under development for the treatment of dementia of the Alzheimer type. To determine the threshold dose for central activity, single doses of the compound were administered to 20 young male volunteers in a double-blind cross-over design and the effects on the sleep electroencephalography studied. The first group of eight volunteers received in random order: placebo, 0.5 mg; and 1 mg SDZ ENA 713. The second group of 12 volunteers received: placebo, 1.3 mg; and 2 mg SDZ ENA 713. Sleep quality was not affected by the study medication, which was well tolerated by all subjects. A statistically significant increase in rapid-eye movement sleep density was observed after doses of 1 mg, 1.3 mg, and 2 mg. Rapid-eye movement latency and slow-wave sleep were not altered. The results demonstrate that SDZ ENA 713 is centrally active in man at well-tolerated doses.


Assuntos
Carbamatos/farmacologia , Inibidores da Colinesterase/farmacologia , Fenilcarbamatos , Sono/efeitos dos fármacos , Adolescente , Adulto , Método Duplo-Cego , Humanos , Masculino , Rivastigmina , Sono REM/efeitos dos fármacos
17.
J Endocrinol ; 164(2): 197-205, 2000 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-10657855

RESUMO

The ageing process in animals and humans is thought to be accompanied by a gradual impairment of corticosteroid receptor function, which is reflected by increased pituitary-adrenocortical hormone secretion at baseline and a number of aberrant neuroendocrine function test results. The latter include the ACTH and corticosteroid responses to a combined dexamethasone (DEX)/corticotropin-releasing hormone (CRH) challenge. The excessive hormonal response to this test among aged individuals has been taken as indirect evidence of enhanced endogenous arginine vasopressin (AVP) release, which - together with peripherally administered CRH - is capable of overriding DEX-induced ACTH suppression. The current study was designed to explore the role of endogenous AVP in mediating excessive hypothalamic-pituitary-adrenocortical (HPA) activity in ageing. The combined DEX/CRH test was administered to aged (22-24 months old) Wistar rats and the effect of the AVP type 1 (V1) receptor antagonist, d(CH(2))(5)Tyr(Me)AVP, on ACTH release was studied. Infusion of the V1 receptor antagonist after DEX pretreatment and before CRH administration prevented the CRH-induced rise in ACTH secretion in comparison with vehicle-treated aged rats (area under the concentration-time curve: 699+/-479 versus 2896+/-759; P<0.01). This difference was absent in young (3 months old) control rats. In situ hybridization showed an increased number of AVP mRNA-expressing neurons in the parvocellular but not the magnocellular, portion of the hypothalamic paraventricular nucleus in DEX-pretreated aged rats. The number and synthetic activity of parvocellular neurons expressing CRH mRNA was also increased. We have concluded that the increased HPA activity in aged rats involves enhanced synthesis and release of AVP from parvocellular neurons, possibly secondary to impaired corticosteroid receptor function.


Assuntos
Envelhecimento/fisiologia , Sistema Hipotálamo-Hipofisário/fisiologia , Vasopressinas/fisiologia , Hormônio Adrenocorticotrópico/metabolismo , Animais , Pressão Sanguínea/efeitos dos fármacos , Corticosterona/metabolismo , Hormônio Liberador da Corticotropina/farmacologia , Dexametasona/farmacologia , Frequência Cardíaca/efeitos dos fármacos , Masculino , RNA Mensageiro/metabolismo , Ratos , Ratos Wistar
18.
Psychopharmacology (Berl) ; 120(4): 449-56, 1995 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-8539326

RESUMO

The effects of flumazenil, a benzodiazepine antagonist, on the sleep electroencephalogram (EEG) and neuroendocrine secretion in early morning recovery sleep (0500-0800 hours) following sleep deprivation (SD; 2300-0500 hours) were studied in seven healthy men. SD induced an increase in slow wave sleep (SWS), a decrease in sleep onset latency (SOL), an enhancement of EEG delta and theta power in non-rapid-eye-movement sleep, an increase in plasma human growth hormone (GH) concentration, and a decrease in plasma cortisol levels in recovery sleep (0500-0800 hours). Plasma GH, but neither plasma cortisol nor adrenocorticotrophic hormone (ACTH) concentration was attenuated during SD as compared to sleep (2300-0445 hours). The administration of flumazenil (3 x 1 mg intravenously) during recovery sleep resulted in an inhibition in SWS, an increase in stage 2 sleep, a selective reduction in delta and theta power, and a tendency to prolongation of SOL. Plasma GH concentration was decreased but plasma cortisol and ACTH remained unaffected. Since the SD-induced changes in sleep EEG and plasma GH secretion were antagonized by flumazenil, it is suggested that electrophysiological and hormonal effects of SD are mediated at least in part through GABAergic mechanisms.


Assuntos
Hormônio Adrenocorticotrópico/sangue , Flumazenil/farmacologia , Hormônio do Crescimento/sangue , Hidrocortisona/sangue , Privação do Sono/fisiologia , Sono/efeitos dos fármacos , Adulto , Eletroencefalografia , Humanos , Masculino , Fatores de Tempo
19.
Peptides ; 16(8): 1475-81, 1995.
Artigo em Inglês | MEDLINE | ID: mdl-8745061

RESUMO

Nocturnal plasma delta sleep-inducing peptide-like immunoreactivity (DSIP-LI) was determined serially in seven healthy male subjects. Time courses during nocturnal sleep (2300-0800 h), nocturnal sleep deprivation (2300-0500 h), and morning recovery sleep (0500-0800 h) after sleep deprivation were compared. A significant decrease in plasma DSIP-LI was found at the transition from wakefulness to sleep in both evening sleep (2300 h) and morning recovery sleep (0500 h). Time courses were accompanied by physiological changes in sleep electroencephalographic slow-wave activity, and in plasma concentrations of cortisol and human growth hormone. No sleep stage specificity was found. It is concluded that DSIP is influenced by the initiation of sleep.


Assuntos
Ritmo Circadiano/fisiologia , Peptídeo Indutor do Sono Delta/sangue , Sono/fisiologia , Adulto , Eletroencefalografia , Hormônio do Crescimento/sangue , Homeostase , Humanos , Hidrocortisona/sangue , Masculino , Fases do Sono/fisiologia
20.
J Psychiatr Res ; 28(4): 381-99, 1994.
Artigo em Inglês | MEDLINE | ID: mdl-7877117

RESUMO

The present study was designed to investigate the clinical efficacy of trimipramine with adjunct sleep deprivation (SD) or bright light (BL) and to evaluate psychometric and neurobiological variables that might be of predictive value for treatment response. We used (1) the combined dexamethasone-corticotropin releasing hormone test (DEX-CRH test) to characterize alterations of the hypothalamic-pituitary-adrenal (HPA) system; (2) polysomnography to evaluate sleep disturbances; and (3) a standardized test battery to assess cognitive psychomotor functions after study initiation and after 5 weeks of treatment. The overall response rate (> or = 50% decrease in score on Hamilton Rating Scale for Depression [HRS]) was 55% (N = 42). The response rate in the group with trimipramine monotherapy (N = 14) was 79%, whereas in the groups with adjunct SD (N = 14) and BL (N = 14), respectively, it was only 43%. All three groups showed significant improvement at the end of the third week of treatment. Neither of the adjunct treatments hastened the onset of antidepressant action as measured by HRS. A significantly higher proportion of nonresponders than responders (p < .05) had HPA dysregulation, disturbed rapid eye movement (REM) sleep (REM latency, REM% first third of night) and decreased non-REM sleep (% stage 2). The non-responders showed significantly more corticotropin (ACTH) secretion after CRH stimulation in the DEX-CRH test than the responders and a less rapid normalization of the neuroendocrine dysregulation (cortisol secretion) (p < .01). In addition, REM latency was significantly shorter in the BL group than in the monotherapy group and estimated duration of illness significantly longer in the SD group than in the monotherapy group. REM latency, percentage of REM sleep during the first third of the total sleep period, percentage of non-REM sleep stage 2 and ACTH release after a DEX-CRH challenge predicted response across all three treatment groups. The neurobiological symptoms were unevenly distributed, among the three groups, thus creating heterogeneity in these measures. This heterogeneity may have contributed to the different treatment response rates as defined by psychopathology (HRS). In contrast, the neuropsychological tests and some of the sleep-EEG investigations revealed different response patterns for different groups: The onset of improvement in simple cognitive functions and in sleep continuity was earlier in the adjunct treatment groups. This study underlines the need for a multidimensional approach including use of neurobiological and neuropsychological measures to identify the therapeutic profiles of different treatment strategies and predictors of outcome.


Assuntos
Transtorno Depressivo/tratamento farmacológico , Transtorno Depressivo/terapia , Fototerapia , Privação do Sono , Trimipramina/uso terapêutico , Hormônio Adrenocorticotrópico/sangue , Adulto , Idoso , Terapia Combinada , Hormônio Liberador da Corticotropina , Transtorno Depressivo/diagnóstico , Dexametasona , Feminino , Humanos , Hidrocortisona/sangue , Sistema Hipotálamo-Hipofisário/fisiopatologia , Masculino , Pessoa de Meia-Idade , Sistema Hipófise-Suprarrenal/fisiopatologia , Polissonografia , Escalas de Graduação Psiquiátrica , Psicometria , Trimipramina/administração & dosagem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA